Valve-gear.



E. D'. DICKINSON. VALVE GEAR.

APPLICATION FILED AUG. 30-

im' Patented Nov. 6, 1917.

2 SHEETS-SHEET 2.

WLMI@ Inventor: L ar`D DicKh-|sor1,

E d b9 QM- lA 'I'jlis oCttor-ne.

ew-ESPATENT OFFICE EDGAR D. DIGKIN'SO N, or VscHENnCmim, NEW YORK, .assIGNon ro GENERAL ELECTRIC COMPANY, A ConPoRnTIoN OFNEWXORK i l' "VALVE-GEAR. 'i 'A lSpacidication oflIiretters Patent.

Patented Nov. 6, 1917.

Application ala August 30,1916. serial No. 117,'262.-V j j b all whomI z't may concer-a Beit known that I, EDGAR D. DICKINSON, a subject of the Kingof Great Britain, yresiding at Schenectady, in the county of Schenectady, State Vof New York, have invented certain new and usefulv Improvements in Valve-Gears, of which the'following is a specification.

The present invention relates to valve gears for controlling the flow ofv elastic fluid to 4turbines or otherprime movers and hasfor its primary object to provide an improvedA structurein valve gears ofA this general' type.

vide an improved valve gear which is particularly adapted for installations comprising two turbine elements, as for example,A

the two turbines or'turbine'sections which goto make up the lforward and reversing Y ,elements of a marine installation.

'.For, a consideration of what I believe to l be novel and my invention, attention is divrec/ted to the accompanying specification and Vthe claims Yappended thereto.

Y A,In the accompanying drawing, Figure 1 .is a side elevation of a portion of van elastic uid turbine with my improvedvalve gear mounted thereon; Fig. 2 is anend'view looking toward the left in Fig. 1; Fig.` 3 is a view Ysimilar to. Fig. 1 but ona smaller scale-so as to show the turbine piping arrangement,

, and Fig. 4 is a perspective view on a larger ing section mounted in a common casing,

scalev of the valve gear. ,y

In the present instance my invention is shown as applied to an elastic fluid turbine comprising a'forward section and a revers- 4and having a common exhaust, this type of machine being well known inv `connection with marine propulsion. 5 indicates the turbine casing leading to which is' an elasticV Huid conduit 6 having two branches 7 and 8, the former of which leads to the forward or "Jahead section ofthe turbine, and the latter to the reversing or astern section. 9 7, indicates the exhaust conduit which is common to both turbine sections. Arranged in the conduits 7 and 8 are valve mechanisms 10 and 11 which control the How of elastic fluid to the ahead and reverse sections respectively. yThese two valve mechanisms are sition. VIn Fig. V1 the valve mechanism 11 is shown in section. y*It lcomprises a balanced valve having two seats 12a1id 13 against which seat the two disks-14: and 15 carried by-stem'l. The one end-17 of the st em of the stem, which will Ybe the'pressureof the` elastic fluid in the conduit. It will be understood-that thevalve may be biased to A further obj ect of my invention is to proclosed position by other means if found desirable. Fastened to the end 17 of the stem isa lever 22 pivoted at one end on a link 23 `which is supported by -a fixed bracket 24:.

The other endV of lever 22 is connectedto a link 25 'pivoted on the end of yan arm 26 fixed toone endof a short shaft 27. -fThe V'link 25 andl arm 26'together form a toggle. The shaft 27 is supported in a bearing 28 carried by the valve: casing and-on it is xed an arm 29, on the end 'of which is pivoted a rod 30. As will be clear from an inspection of the-drawing,.a movement of the rod 30 toward the Yleft will rockrthe shaft 27 Vin a rdirection to open the valve mechanism 11,

4sake of clearness, but it isv shown in Figs. 2

and 3, and the same reference numerals Ywith the `exponent a added have been applied to corresponding parts so'far as they show inthe drawing. Thearrangement is such thatthe rod 30a for valvemechanism 10 moves inthe opposite direction to rod" 30 of Vvalve :mechanism 11 in its opening and closing movements. Y

The arrangement for moving the rods 3C and 30% will now be described. Supported Ain two bearings 31is a shaftl 35 to one end fof which is xed an operating lever 36 having a handle 37 The'shaf-t 35 is partly Abroken away in Fig. 2 to show some of the parts. behind it. "38 indicates an VAarm fwhich is'fixed on shaft 35 at oneendand lwhich 'is provided 'at the other end with a aVl forked end45 Which engages truanions onashortsleeve 46 Whichfslides oit rodiOa. rIhe sleeve 46 isadaptedto engageanabut- Yment 47 on the.endotrodOa'tor transm-ittingmotionto it. 4Vith the abQWQdescribed arrangement vWlienrthe operating -lever 36A is turnedvto .the right `(Fig.v l) the sleeve L46 engages abutment thus pullinggarm 29a lin a direction to ,open valvemeehanisml() and admitr elastic- Huid to the ahead sentient-of the turbine. At. Athelsametimetheslee ve 1. 41 slides on ,rod 30 'with anidle movement,

the valve 1l remaining closed. 1f, noW,the operating lever y36. is turned towardithe left, the sleeve 46 is firstmovedawayfromx L abutment 4Z thus permitting thevalve meehanism l to close, Yitfbeing ,.fremembered.. that y such. valve mecha-nisniis,biased ltoward A closed position. L* The `-sleeve, v4l. Jon;v rodv 30 5 then engages I abutmenty 42,and. Y moves, the..4

valve mechanism 11, thus admitting. elastic fluid to thereversingisection lof theturbiaie. 1t Willi thus be seenothatcheg :one A operating el lever is used for actuating :both(valve meehanisms.:

1t may sometimes ,happertithat the valve mechanisms Will sticloopen, andinorderlto insuretheiry being positively clQsedYZunder..

iii

such circumstances thevfolloyving I arrangement is provided. Each of theforks 39, ando. is providedl With-ahoolr 4S.pivoted at 49. f The rend 50r of thev hook has a slot in; it

v throughivhich theibolt 51 passes,ane-Lit` is held in fixed positionlin theslot ley/two` i bolts 152; By .movingthe two bolts 52lthehook can be adjusted on` its. pivot49. On eaoh of stops 42 and 47 is a When n the valve mechanisms are closed the hooks when either valve mechanism. iis @opened the. .Y corresponding hook `:moves around.A the :pin

vand into a position 't0-engage it ontheclosing movement ofthe operatingglevershould the valvemechanism stick opeit`r Referring.: to Fig. 1 it, Will be seen that .th e.tip of.the v hook 48 is just below.pin53 `If theoperating leverl 36 ismoved tothe leftNt-heihook will pass. under thepiin, the*adjustmentv of t it ,beingsuch as to just provideyfor -this.' -f Onthe other hand, if the operating vlever 36 is movedtoy the right to; openvalyemech-- anism 11.7 then the hook 48;.ivill move' .upl around pin .53, and ,if on,l the closing opera-f tion `the abutment 42 fails, to lfollow the movement of the sleeve 41J due, for example',v

to the sticking open of the valve mechanism, then the; hook avi-ll l `:come into engagement Withthe .pinandpositively close the Valve mechanism.

55 indicates a segment over which the operating lever 36 moves and to which it may beclamped in any adjusted-position. The :clamping means comprises a short arm 56 pivoted V'on Vthe lever 36 with its end behind the segment. ,5.5..,` 5.7?,ndicatesa bolt which. passes through thejarinfl56 andflever 36 .and hasa :Wingniit onsite freeend, By screwing this fwingh'nut, upsthe leverf36 is clamped .toV the segment 55. f The segment.

isl pivoted on shaft 35 andois Vheld from turningfbya latch) 60 engaging a notch 6I in it. The latch 60 isixedonashaft 62 journaled .in bearings 63 ,and is 'held in' the nCll by ,il Suitable spring l64, jv Onl lshaft be clear ,whenA this occuijswthe segment '55 is released,j thus` releasing i the lever arm 36 which i, will l bey returned to neutral position, carrying Withitfthe segment `5571to Which itI is clamped. :l "Thi-s1 movement lto neutral Position. Y Cedars. lbecause ,the :valve mechaniSInS 10. areboth' biased to' closed position.Y '76h inci'cates a resetting handle for the emergency governor mechanism and' 71 stops at V the two lovv'er, outer corners-'of the segment 55".to limitthe movement of the operatingwlever 36; 72 isa handvalve in the'gconduit which A`maybe closed manually Y Y `Vto cnt o'fthfeiiv of elastic Huid to the lre- 48 are disengagedy from thepms- 53@rbut v velsin'gA Section foflthe; turbine-- i VPromithe foregoing description it A is be' lievedjthat the operatninifof' my improved apparatus Vwill be clear yWithout further y eX- planeten- Y The structure hasthe advantages that it is`simpleg-andicompact and that onlyI a singleoperating leveris requiredV for bothvalve mechanisms. flso it has the advantages that a Q single emergency' i speed lgovernor mechanism operates tdcau'se the closing of either valve mechanism in case o'reXcess speed, andl thatin' case vvone ofthe valves slfionldjutendi to stickY openlit will" beV positively` closed.

In accordancelwiththe provisions ofthe patent statutes, I` have described the principle of operation of my invention, together with the apparatus which I now consider to represent the best embodiment thereof; but I desire to have it understood that the apparatus shown is only illustrative, and that the invention can be carried out by any other means.

What I claim as new and desire to secure by Letters Patent of the United States, is

l. In an apparatus of the character described, the combination of two turbine elements, a conduit for conveying elastic fluid to each, a valve mechanism in each conduit, means biasing them to closed positions, a single controlling device for said valve mechanisms which when operated in onev direction opens one of the valves and when operated in another direction opens the other, said controlling device permitting the one valve mechanism to close prior to the opening of the other, a pivotally supported segment over which said controlling device moves, means for clamping the controlling device to the segment in any adjusted position, a latch for holding the segment to prevent it from moving on its support, and means for releasing said latch whereby either of said valve mechanisms may quickly move to closed position.

2. In an apparatus of the character described, the combination of a forward turbine element, a reversing turbine element, a conduit for conveying elastic Huid to each, a valve mechanism in each conduit, means biasing them to closed positions, an operating lever' common to the two valve mechanisms which when moved in one direction opens one of them and when moved in another direction opens the other, said operating lever permitting the one valve mechanism to close prior to the opening of the other, a pivotally supported segment over which said operating lever moves, a latch for holding it in fixed position relative to its support, means controlled by the speed of the turbine for releasing said latch, and

means for clamping the operating lever to the segment.

3. In an apparatus of the character described, the combination of a forward turbine element, a reversing turbine element, a conduit for conveying elastic fluid to each, a valve mechanism in each conduit, means biasing them to closed positions, an operating lever common to .the two valve mechanisms which when moved in one direction opens one of them and when moved in another direction opens the other, a shaft upon which said operating lever is iiXed, means connecting the shaft to the valve mechanisms, a segment pivoted on said shaft and over which the operating lever moves, means for clamping the operating lever to the segment, a latch for holding the segment from turning and means for releasing the latch in case of excess speed of the turbine.

4. In an apparatus of the character described, the combination of two turbine elements, a conduit for conveying elastic fluid to each, a valve mechanism in each conduit, means biasing them to closed positions, an operating rod for each valve mechanism, a shaft, a lost motion connection between each rod and the shaft, said shaft when turned in one direction opening one of said valve mechanisms and when turned in the other direction opening the other and permitting the one to close if open, an operating member for the shaft, a pivoted segment over which it moves, means for clamping the member to the segment, a latch which engages the segment to hold it in fixed position, and means for releasing the latch whereby either of said valve mechanisms may quickly move to closed position.

In witness whereof, I have hereunto set my hand this 26th day of August, 1916.

EDGAR D; DICKINSON.

Witnesses:

BENJAMIN B. HULL, HELEN ORFORD.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patenti,

Washington, D. C. 

